About: http://webisa.webdatacommons.org/361928679

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	This problem is particularly troublesome in situations where it is desired to monitor the concentration of a component over a relatively long period of time.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk